We will be happy to address your latest questions. Before doing so, please reply to the license questions we have asked you in ticket "Custom ListViewVisualItem".
We will reply as soon as we receive your licensing information. Thank you for the cooperation.
the Telerik team
Q2’11 SP1 of RadControls for WinForms is available for download (see what's new); also available is the Q3'11 Roadmap for Telerik Windows Forms controls.